iStockphotos/Thinkstock(NEW YORK) -- A suspect believed to be responsible for throwing a man into the path of an oncoming New York City subway train, and who was taken into custody Tuesday, has made statements implicating himself, police said.

According to Deputy Commissioner for Public Information Paul Browne, the suspect has been questioned by police since at least early afternoon Tuesday, and while the suspect is in police custody, he has not been officially charged.

Police are continuing to question the suspect, and more lineups have been scheduled for Wednesday, Browne said.

Police have not released the suspect's name but began questioning him Tuesday afternoon about the death of Ki-Suck Han, 58, of Queens, N.Y.

Han was tossed onto the subway track at 49th Street and Seventh Avenue around 12:30 p.m. Monday after Han confronted a mumbling man who was alarming other passengers on the train platform. Han tried to scramble back onto the platform, but was crushed by an oncoming train.

The suspect fled the station, prompting a police dragnet for a man described by witnesses and seen on surveillance video as a 6-foot-tall, 200-pound black man wearing dreadlocks in his hair.

Witnesses tried to revive the victim after he was hit and provided descriptions of the suspect to police.

Dr. Laura Kaplan, medical resident at Beth Israel Medical Center who was standing on the platform during the incident, rushed to give Han aid after he was hit, she said in a statement released by her medical practice Tuesday.

"A security guard and I performed 3-4 minutes of chest compressions. I hope the family may find some comfort in knowing about the kindness of these Good Samaritans, as they endure this terrible loss," Kaplan said.

"I would like the family to know that many people in the station tried to help Mr. Han by alerting the subway personnel," she said.

Kaplan said she wanted to console the family of Han, whom she called "a brave man trying to protect other passengers that he did not know."

The suspect had reportedly been mumbling to himself and disturbing other passengers, according to ABC News affiliate WABC. Police told WABC that the suspect could be mentally disturbed.

The suspect could be heard arguing with Han just moments before he hurled Han onto the track bed, according to surveillance video released by the police. The suspect is heard telling the victim to stand in line and "wait for the R train."

A freelance photographer for the New York Post was on the platform and said he ran towards the train flashing his camera hoping to alert the train to stop in time, but the train caught Han against the shoulder-deep platform wall.

The photographer, R. Umar Abbasi, caught an eerie photo of Han with his head and arms above the platform and staring at the oncoming train.

Han was treated by EMS workers on the platform for traumatic arrest and rushed to Roosevelt Hospital, where he was pronounced dead, according to the Fire Department of New York.

"I just heard people yelling. The train came to an abrupt stop about three-quarters into the station and that's when I heard a man was hit by a train," Patrick Gomez told ABC News affiliate WABC.

Police set up a command post outside the train station Monday night searching nearby surveillance cameras to try and get a clear image of the suspect, reports WABC. They said Tuesday that the investigation is ongoing.